Expansion joint device

Abstract

The present invention relates to an expansion joint device, comprising two support seats and a plurality of connecting seats, wherein the plurality of connecting seats are arranged in sequence along the length direction of the expansion joint of the bridge, and each connecting seat is connected between the two beam ends of the bridge, thereby forming a supporting surface for bearing weight, so that the support seat itself can replace the comb tooth structure of the traditional expansion joint, and play a load-bearing role at the position between the two end beams of the bridge; not only that, the two ends of each connecting seat are rotatably connected to the support seat on the corresponding side through a ball head piece, so that with the help of the rotation of the ball head, no matter the end beams on both sides of the bridge produce longitudinal or lateral displacement or rotation angle, the ball head piece can effectively compensate for the movement between the two, and even has a good offsetting effect on the generated torque, and the combined design form of the connecting seat and the ball head piece that integrates support and adjustment is simple to assemble and has a short construction period, which greatly improves the construction and maintenance efficiency of the bridge.

Description

Technical Field

[0001] The invention relates to the field of bridge expansion joint devices, and in particular to an expansion joint device. Background Art

[0002] Bridges are open-air permanent structures that cross obstacles such as rivers, deep valleys and built roads. Due to factors such as temperature changes, concrete shrinkage and creep, and variable loads, the bridge beam ends will creep. In order to adapt to this characteristic of the bridge structure, expansion joints that can deform freely must be set in the bridge structure and between the beam ends and the back wall of the abutment to ensure the smoothness of the bridge deck and protect the structure. As one of the important functional parts of bridge engineering, bridge expansion joints are usually set between the two beam ends, between the beam ends and the abutments, or at the hinged position of the bridge.

[0003] Although conventional comb plate expansion joint devices can meet the requirements of expansion and contraction of beams, it is difficult to realize the vertical rotation function of beams. For this reason, the applicant's prior application "A bridge expansion joint device" discloses such an expansion joint device, and its patent number is: CN201821896294.0. The expansion joint device adopts a cross-slot plate rigidly connected to a rotating shaft. The cross-slot plate rotates longitudinally through the rotating shaft with the support pressure plate and the center hole of the lower support seat as the axis, so that the bridge expansion joint device has a longitudinal rotation function.

[0004] In the prior art, in addition to using a rotating shaft to cope with the vertical position change of the bridge, some applications also use a spherical matching structure. For example, another prior application of the applicant, with the Chinese invention authorization patent number: CN200610051945.1, "A bridge expansion joint device with multi-directional displacement capability", sets a lower support plate under the span plate, and sandwiches a flat slide plate, an intermediate block and a spherical slide plate between the two. The span plate will freely displace with external force, and its width will also freely expand and contract when it expands and contracts due to heat, so that the beam body and the span plate can remain intact and unbroken when they undergo multi-directional deformation and relative translation due to factors such as temperature and wind force, thereby achieving resistance to multi-directional displacement. However, the adjustable angle is small only through the cooperation of the spherical slide plate, and many bridges under harsh working conditions cannot meet the use requirements; in addition, some related patents disclose the concept of ball head cooperation, such as the Chinese invention patent "A reinforced expansion joint special-shaped steel" with patent number: CN201822136149.9 and the Chinese invention patent "Bridge expansion joint" with patent number: CN201520235825.1. Both of them use ball heads for connection in related structural components, but the ball heads used in the two do not participate in load-bearing. One of them is used to strengthen the support strength, and the overall support does not abandon the comb plate type expansion joint model, and the other is for easy disassembly. That is, although the above-mentioned prior art discloses better connection forms such as spherical fit, there is no dedicated adapter structure to effectively solve the technical obstacles in bridge construction. Some large bridges are affected by the environment, temperature, heavy load, strong wind, ocean currents, tides, and earthquakes during use. In addition to longitudinal displacement and longitudinal rotation, there will also be lateral displacement and horizontal rotation. Some bridges will even generate torque between the two end beams. These are all problems that need to be solved.

[0005] In summary, further improvements need to be made to the existing bridge expansion joint devices. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide an expansion joint device which adopts ball head parts at the connection points to cope with the displacement of the bridge in various directions in view of the current status of the prior art.

[0007] The second technical problem to be solved by the present invention is to provide an expansion joint device which can effectively provide vertical and lateral support for the ball head member in view of the current status of the prior art.

[0008] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: an expansion joint device, including two support seats respectively arranged on the end beams on both sides of the bridge expansion joint, and also including:

[0009] A plurality of connection seats are arranged in sequence along the length direction of the expansion joint of the bridge, and the two ends of each connection seat are rotatably connected to the support seat on the corresponding side through a ball head; each connection seat is located between the two beam ends, and each connection seat as a whole forms a support surface for bearing weight between the two beam ends.

[0010] The ball head component can be of different assembly forms. Preferably, the ball head component includes a main body and a ball head arranged on the main body. The main body is installed at the bottom of the connecting seat. The support seat is provided with a limit groove for the ball head to rotate and limit therein at a position corresponding to the ball head. Of course, the ball head component can also be arranged on the support seat, and the adjustment between the two end beams of the bridge can be achieved through the cooperation between the connecting seat and the ball head component. In actual construction, different alternatives can be selected according to different bridge usage scenarios.

[0011] In order to ensure that there is sufficient adjustment gap between the connecting seat and the bottom when the end beams on both sides of the bridge produce vertical movement or rotation, preferably, the main body is rod-shaped and extends vertically, and the connecting seat is provided with a mounting hole matching the main body. Of course, the vertical here includes but is not limited to vertical, and can be based on the vertical direction and have a certain angle in the lateral direction.

[0012] Preferably, the extension lines of the two bodies in their own length directions intersect above the connecting seat. With such a design of the body, when the end beams on both sides of the bridge produce lateral movement, rotation or twisting, the connecting seat and the ball head piece can effectively compensate for the distance difference caused by the above movement, thereby ensuring the integrity of the end beams on both sides of the bridge.

[0013] There can be various assembly forms of the connecting seat and the supporting seat. Preferably, the longitudinal cross-section of the supporting seat is L-shaped, so that a recessed area is defined between two right-angled sides of the L-shape, and the limiting groove is opened in the recessed area.

[0014] In order to further solve the second technical problem mentioned above, the technical solution adopted by the present invention is as follows: the limit groove is opened at the corner of the L-shaped support seat, and when the ball head is assembled in the corresponding limit groove, a gap is left between the two right-angled sides of the connecting seat and the corresponding recessed area. The position design of the limit groove can ensure that when the ball head part and the support seat are assembled, the corner of the support seat provides strong support to the combination of the connecting seat and the ball head part. Since the extension lines of the two ball head parts in their own length directions intersect above the connecting seat, the external force acting on the connecting seat can be effectively decomposed by the ball head part and shared by the two right-angled sides of the support seat respectively. In this way, the support seat itself does not need a particularly high strength to cope with the complex bridge deck load-bearing requirements, and the requirements for material economic costs and assembly forms are greatly reduced.

[0015] The above-mentioned support seat can be integrally formed, but in order to facilitate targeted replacement and maintenance when damaged, preferably, each of the connecting seats is provided with a seat body at both ends, and the seat bodies arranged on the same side are connected to form a support seat, and each of the seat bodies is provided with the above-mentioned limit groove.

[0016] Preferably, each of the seat bodies includes a bottom plate and a side plate, the side plate is provided on the bottom plate and arranged on one side of the bottom plate, so that the longitudinal cross-section of the entire seat body is L-shaped, and the limiting groove includes a first groove section formed at the lower part of the side plate and a second groove section formed at the upper part of the bottom plate, and the first groove section and the second groove section are connected at the L-shaped corner.

[0017] Specifically, the first groove section and the second groove section are both in an arc-shaped structure that matches the ball head and is concave.

[0018] In order to ensure that the entire expansion joint device can respond to changes in the bridge in a timely manner during the expansion and contraction activities of the bridge, the expansion joint device also includes a guide member arranged on at least one of the end beams on both sides of the bridge expansion joint, and the guide member extends along the length direction of the bridge expansion joint, and each of the seat bodies is slidably constrained on the corresponding guide member.

[0019] Specifically, the guide member is an I-beam, and a T-shaped slot for inserting the I-beam is correspondingly opened at the bottom of each base plate.

[0020] In order to facilitate the disassembly and assembly of the ball head, preferably, the connecting seat also includes a limiting member for limiting the body from being separated from the mounting hole. The limiting member is arranged in the mounting hole and is detachably connected to the upper end of the body.

[0021] Specifically, the limiting member is a nut, and a threaded portion is correspondingly provided at the upper end of the main body.

[0022] Preferably, a dustproof piece is provided in the mounting hole, the dustproof piece is disc-shaped and sleeved on the main body, and the outer diameter thereof gradually increases from top to bottom.

[0023] Compared with the prior art, the advantages of the present invention are: in the expansion joint device, multiple connecting seats are arranged in sequence along the length direction of the expansion joint of the bridge, and each connecting seat is connected between the two beam ends of the bridge to form a support surface for bearing weight; in this way, the support seat itself can replace the comb tooth structure of the traditional expansion joint, and play a load-bearing role at the position between the two end beams of the bridge; not only that, the two ends of each connecting seat are rotatably connected to the support seat on the corresponding side through a ball head piece, so that with the help of the rotation of the ball head, no matter whether the end beams on both sides of the bridge produce longitudinal or lateral displacement or rotation angle, the ball head piece can effectively compensate for the movement between the two, and even has a good offsetting effect on the torque generated, and the combined design form of the connecting seat and the ball head piece that integrates support and adjustment is simple to assemble and has a short construction period, which greatly improves the construction and maintenance efficiency of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the overall structure of the expansion joint device in an embodiment of the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the explosion from another angle;

[0026] Figure 3 for Figure 2 A magnified schematic diagram of the structure in the middle;

[0027] Figure 4 is a side cross-sectional view of an expansion joint device in an embodiment of the present invention;

[0028] Figure 5 It is a side cross-sectional view of the support seat in the embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 5 As shown, it is a preferred embodiment of the present invention. In this embodiment, the expansion joint device includes two support seats 1 and a plurality of connecting seats 2. The above-mentioned two support seats 1 are respectively arranged on the end beams on both sides of the expansion joint of the bridge. The support seat 1 here can be a complete whole, or it can be composed of multiple smaller units. For the convenience of maintenance, the actual construction is preferably in the form of multiple units splicing. For example, a seat body 10 is provided at both ends of each connecting seat 2, and the seat bodies 10 arranged on the same side are connected to form the above-mentioned support seat 1.

[0031] In this embodiment, the expansion joint device also includes a guide member 4, which extends along the length direction of the bridge expansion joint, and at least one of the end beams on both sides of the bridge expansion joint is provided with the guide member 4, and each of the above-mentioned seats 10 is slidably constrained on the corresponding guide member 4. The matching form of the seat 10 and the guide seat 4 can ensure that when the bridge changes, the seat 10, as an important component of the expansion joint device, can respond to the changes in the bridge in a timely manner. Of course, the guide member 4 can adopt different structural forms. The guide member 4 in this embodiment is an I-beam, and the bottom of each bottom plate 12 is correspondingly provided with a T-slot 121 for inserting the I-beam. The T-slot here refers to a slot with a T-shaped longitudinal section.

[0032] The above-mentioned multiple connection seats 2 are arranged in sequence along the length direction of the bridge expansion joint. For each connection seat 2, both ends thereof are rotatably connected to the support seat 1 on the corresponding side through the ball head 3; and the upper surface of each connection seat 2 is connected between the two beam ends, and each connection seat 2 as a whole forms a support surface for bearing weight between the two beam ends. The above-mentioned multiple connection seats 2 replace the traditional comb plate structure, are directly laid on the bridge deck, and are used for bearing weight.

[0033] Of course, the ball head component 3 can be selectively installed on one of the support seat 1 and the connecting seat 2. However, during the construction process, the support seat 1 is often pre-buried in the end beams on both sides of the bridge. Therefore, if the ball head component 3 is installed on the support seat 1, more parts need to be disassembled for later maintenance and construction, which is not conducive to maintenance and construction. Therefore, in this embodiment, the above-mentioned ball head component 3 includes a main body 31 and a ball head 32 provided on the main body 31. The main body 31 is installed at the bottom of the connecting seat 2. The support seat 1 is provided with a limit groove 11 for the ball head 32 to rotate and limit therein at a position corresponding to the ball head 32. Since the support seat 1 is formed by splicing a plurality of seat bodies 10, this embodiment adopts a design form in which the seat body 10 and the limit groove 11 correspond to each other, that is, a limit groove 11 is provided on each seat body 10.

[0034] Specifically, the longitudinal cross section of the support seat 1 in this embodiment is L-shaped (the seat body 10 formed by splicing the support seat 1 has the same longitudinal cross section as the support seat 1, and is also L-shaped), so that a recessed area 1b is defined between the two right-angled sides of the L shape, and the above-mentioned limiting groove 11 is provided in the recessed area 1b. Of course, the seat body 10 formed by splicing the support seat 1 can also be designed as an integral part or a split part. The seat body 10 in this embodiment can be divided into two parts, namely Figure 5As shown in the bottom plate 12 and the side plate 13, it can be seen from the above that since the longitudinal section of the seat body 10 is also L-shaped, the side plate 13 is arranged on one side of the bottom plate 12, and the longitudinal sections of the two respectively form two right-angled sides of the L-shape. The above-mentioned limiting groove 11 is opened at the corner of the L-shaped support seat 1, which means that the limiting groove 11 is actually formed by splicing the first groove section 111 opened on the side plate 13 and the second groove section 112 opened on the bottom plate 12. Of course, in order to ensure the assembly of the ball head 32, the limiting groove 11 is a spherical groove that adapts to the ball head 32, that is, the first groove section 111 and the second groove section 112 are both arc-shaped structures that match the ball head 32 and are concave. When the ball head 32 is assembled in the corresponding limit groove 11, a gap 1a is left between the above-mentioned connecting seat 2 and the two right-angled sides of the corresponding recessed area 1b. In this way, when adjusting, the connecting seat 2 has enough space for it to move to cope with the vertical and lateral movements of the end beams on both sides of the bridge, and can also cope with the torsion generated by the two.

[0035] Of course, the ball head 3 can have different structures as long as the assembly between the connecting seat and the support seat can be achieved. However, in the present embodiment, the main body 31 is rod-shaped and extends vertically, and a mounting hole 21 matching the main body 31 is provided on the connecting seat 2. The vertical mentioned here includes vertical, but is not limited to vertical. For example, in actual production, the extension lines of the two main bodies 31 in their own length directions intersect above the connecting seat 2. Such a design can have many advantages. One of them is that when the end beams on both sides of the bridge produce lateral movement, corners or twisting, the connecting seat 2 and the ball head 3 can effectively compensate for the distance difference caused by the above movement, thereby ensuring the integrity of the end beams on both sides of the bridge. And it is precisely because the ball head 2 is assembled in this way that an angle is generated between the two ball head pieces 3 at both ends of the connecting seat 2 and the connecting seat 2, so that the corners of the support seat 1 can strongly support the combination of the connecting seat 2 and the ball head 3. That is, since the extension lines of the main bodies 31 of the two ball head components 3 in their own length directions intersect above the connecting seat 2, the external force acting on the connecting seat 2 can be effectively decomposed by the ball head components 3 and shared by the two right-angled sides of the support seat 1 respectively. In this way, the support seat 1 itself does not need particularly high strength to cope with complex bridge deck load-bearing requirements, and the requirements for material economic costs and assembly forms are greatly reduced.

[0036] In addition, a certain angle is also formed between the single ball head component 3 and the connecting seat 2, that is, the ball head component 3 is inclined relative to the connecting seat 2. When the two end beams of the bridge produce lateral displacement or twisting, the seat body 10 will slide relative to the I-beam. This inclined arrangement can prevent the single connecting seat 2 from tipping over during movement, thereby ensuring the stability and flatness of the connecting seat 2 as part of the road surface.

[0037] In this embodiment, the connection base 2 further includes a limiting member 22 for limiting the body 31 from being separated from the mounting hole 21. The limiting member 22 is disposed in the mounting hole 21 and is detachably connected to the upper end of the body 31. The limiting member 22 can be in different forms. The limiting member 22 in this embodiment is a nut. A threaded portion is correspondingly disposed at the upper end of the body 31. In order to prevent the nut from being corroded by wind, sun, rain, etc., a dustproof member 23 is disposed in the mounting hole 21. The dustproof member 23 is disc-shaped and sleeved on the body 31, and the outer diameter gradually increases from top to bottom.

[0038] In addition, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used in the specification and claims of the present invention to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An expansion joint device, comprising two support seats (1) respectively arranged on the end beams on both sides of the expansion joint of a bridge, It is characterized in that Also includes: A plurality of connection seats (2) are arranged in sequence along the length direction of the bridge expansion joint, and both ends of each connection seat (2) are rotatably connected to the support seat (1) on the corresponding side through a ball head member (3); each connection seat (2) is located between two beam ends, and each connection seat (2) as a whole forms a support surface for bearing weight between the two beam ends; The ball head component (3) comprises a body (31) and a ball head (32) arranged on the body (31); the body (31) is mounted on the bottom of the connecting seat (2); the support seat (1) is provided with a limiting groove (11) at a position corresponding to the ball head (32) for the ball head (32) to be rotatably limited therein; The body (31) is rod-shaped and extends vertically, and the connecting seat (2) is provided with a mounting hole (21) matching the body (31); The extension lines of the two main bodies (31) in their length direction intersect above the connecting seat (2); The longitudinal cross-section of the support seat (1) is L-shaped, so that a recessed area (1b) is defined between two right-angled sides of the L-shape, and the limiting groove (11) is arranged in the recessed area (1b). The limiting groove (11) is arranged at a corner of the L-shaped support seat (1).

2. The expansion joint device according to claim 1, Features: When the ball head (32) is assembled in the corresponding limiting groove (11), a gap (1a) is left between the connecting seat (2) and the two right-angled sides of the corresponding recessed area.

3. The expansion joint device according to claim 2, Features: Both ends of each connecting seat (2) are provided with a seat body (10), the seat bodies (10) arranged on the same side are connected to form a supporting seat (1), and each seat body (10) is provided with the limiting groove (11).

4. The expansion joint device according to claim 3, Features: Each seat body (10) comprises a bottom plate (12) and a side plate (13); the side plate (13) is disposed on the bottom plate (12) and arranged on one side of the bottom plate (12), so that the longitudinal cross-section of the entire seat body (10) is L-shaped; the limiting groove (11) comprises a first groove section (111) formed at the lower part of the side plate (13) and a second groove section (112) formed at the upper part of the bottom plate (12); the first groove section (111) and the second groove section (112) are connected at the corner of the L-shape, and the first groove section (111) and the second groove section (112) are both in the form of an arc structure that matches the ball head (32) and is concave.

5. The expansion joint device according to claim 4, Features: It also includes a guide member (4) arranged on at least one of the end beams on both sides of the bridge expansion joint, the guide member (4) extending along the length direction of the bridge expansion joint, and each of the seat bodies (10) is slidably constrained on the corresponding guide member (4); the guide member (4) is an I-beam, and the bottom of each of the bottom plates (12) is correspondingly provided with a T-shaped slot (121) for inserting the I-beam.

6. The expansion joint device according to any one of claims 1 to 5, Features: The two connecting seats (2) are also provided with a limiting member (22) for limiting the body (31) from being separated from the mounting hole (21); the limiting member (22) is arranged in the mounting hole (21) and is detachably connected to the upper end of the body (31).

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